Which of the following would be an example of natural selection?
A. Mutations change the gene frequency of a population.
B. All of the plants on an island are killed by a volcanic eruption.
C. In a forest, the taller oak trees produce twice as many acorns as shorter ones.
D. Mice that were painted with a white stripe by biologists were eaten by predators more often than those that were not painted.
C. In a forest, the taller oak trees produce twice as many acorns as shorter ones.
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A researcher is looking at different petri dishes containing the yeast C. albicans. In the first dish she evaluates, she notices that the yeast does not form hyphae. Is this a mutant strain of yeast?
A. Yes, as the lack of hyphae denotes pathogenic yeast. B. Yes, as yeast typically forms hyphae. C. No, as yeast does not normally form hyphae. D. No, as yeast always forms rhizoids and not hyphae.
Which part(s) of a neuron that conduct(s) an electrical signal towards an adjacent neuron?
a. dendrites b. cell body c. axon d. both dendrites and the axon e. dendrites, cell body, and the axon
What is the name of the process by which mitochondria and chloroplasts probably evolved?
a. endocytosis b. endosymbiosis c. exocytosis d. exosymbiosis
Which of the following were challenges that had to be overcome to sequence the genome of wheat, Triticum aestivum? (Select all that apply)
A. Lack of advanced sequencing technology B. Large genome size (~5 times as large as human genome) C. High mutation rate of wheat genes D. An abundance of repetitive DNA E. Lack of interest/support in sequencing the genome